Content Loaders
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Content Loaders are covered in greater detail in the <a href="/documentation/deployment">Deployment</a> document.

Content Loaders inherit from the abstract class ContentCourierFactory, and implement two public methods

- loadContent method
- applyPassthroughFilter method
    
A Content Loader will have a reference to the main ContentCourier application through the contentCourierApplication property.

Each ContentCourier application has a single Content Loader, which is specified in the Factory instantiation method. You can find the Factory instantiation method in index.php.  It's the responsibility of the Content Loader to determine, based on context, which content-source should be used.

